Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755233AbZI3ToE (ORCPT ); Wed, 30 Sep 2009 15:44:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754893AbZI3ToD (ORCPT ); Wed, 30 Sep 2009 15:44:03 -0400 Received: from mail-bw0-f210.google.com ([209.85.218.210]:54536 "EHLO mail-bw0-f210.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754735AbZI3ToC (ORCPT ); Wed, 30 Sep 2009 15:44:02 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=LvmovJ8xbke7nJomDCEIEUXH5pwrCFJAPN/KLGnPRfAQxBMgwthiZPuR8vBJrWaG+z 0ndf+ZFi5NnkGRwSxZS7qi/0DnyFoESmqzvKKpqwXkBvXOp+2XR4BDgEMJf2s6u7yFE+ 6SbftiSvrbRfoAZa9uPLdfSw4AkTepTKThGk0= MIME-Version: 1.0 In-Reply-To: References: <20090928142903.GD17514@mit.edu> Date: Wed, 30 Sep 2009 21:44:04 +0200 Message-ID: Subject: Re: ext4/reiser3/btr directory create/read perf From: wbrana@gmail.com To: Theodore Tso , linux-kernel@vger.kernel.org Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 913 Lines: 31 On Wed, Sep 30, 2009 at 9:05 PM, wrote: > I reduced benchmark to 10 directories and executed with strace I meant 5 directories. > > Times with 10000 directories and dir_index enabled > > /mnt/md8: 64 kB chunks > ext4 > void cfs::vdirs_create(): 4996 msec > void cfs::vdirs_read(): 5100 msec > Times with 1000 directories and dir_index enabled /mnt/md8: 64 kB chunks reiser3 void cfs::vdirs_create(): 973 msec void cfs::vdirs_read(): 60 msec ext4 void cfs::vdirs_create(): 2435 msec void cfs::vdirs_read(): 3326 msec btrfs void cfs::vdirs_create(): 1036 msec void cfs::vdirs_read(): 155 msec ext4 was 55 times slower than reiser3 in vdirs_read() -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/